title: Animal evolution: trilobites on speed.
abstract: A new study quantifies rates of morphological and molecular evolution for arthropods during the critical Cambrian explosion. Both morphological and molecular evolution are accelerated--but not so much to break any speed limits.
authors.affiliation: Department of Earth Sciences, Palaeobiology, Uppsala University, Villavägen 16, Uppsala, Sweden SE 75236. Electronic address: graham.budd@pal.uu.se.
authors.forename: Graham E
authors.initials: GE
authors.lastname: Budd
mesh_terms: D000818:Animals; D001181:Arthropods / Q000145:classification* / Q000235:genetics*; D005075:Biological Evolution; D019521:Body Patterning / Q000235:genetics*; D019143:Evolution, Molecular; D016678:Genome / Q000235:genetics*